package chapter05;

public class Example08 {
    public static void main(String[] args){
        System.out.println("1,添加---------------");
        add();
        System.out.println("2,删除---------------");
        remove();
        System.out.println("3,修改---------------");
        alter();
    }
    public static void add(){
        StringBuilder sb = new StringBuilder("itcastcn");
        sb.append("itcast");
        System.out.println("append添加结束:" + sb);
        sb.insert(2,"123");
        System.out.println("insert添加结果:" + sb);
    }
    public static void remove(){
        StringBuilder sb = new StringBuilder("itcastcn");
        sb.delete(1,5);
        System.out.println("删除指定位置结束:" + sb);
        sb.deleteCharAt(2);
        System.out.println("删除指定位置结果:" + sb);
    }
    public static void alter(){
        StringBuilder sb = new StringBuilder("itcastcn");
        sb.setCharAt(1,'p');
        System.out.println("修改指定位置字符结果:" + sb);
        sb.replace(1,3,"qq");
        System.out.println("替换指定字符结果");
        System.out.println("字符串反转结果" + sb.reverse());
    }
}
